发明名称 |
Detection of stress applied to an optical fibre. |
摘要 |
<p>Shocks or sudden stresses caused by attempts to tap into an optical fibre network are detected by monitoring the "speckle pattern" produced by intermodal interference at the output of a multimode fibre (2). The fibre is a single mode optical fibre communication link through which a monitoring beam having a wavelength at which the fibre supports multiple propagation modes is also transmitted.</p> |
申请公布号 |
EP0332473(A1) |
申请公布日期 |
1989.09.13 |
申请号 |
EP19890302421 |
申请日期 |
1989.03.10 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY |
发明人 |
HILL, GODFREY RICHARD;STANLEY, IAN WILLIAM;WHITE, KENNETH IAN |
分类号 |
G01M11/00;G01D5/353;G02B6/00;H04B10/85 |
主分类号 |
G01M11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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